Some of these things are best left as historical artifacts.
Six decades ago I had a twin Paxton blown 312 Y-Block in a 57 Fairlane 500. To get the carbs to work with the Paxtons I had to use cast aluminum air boxes that enclosed each carb with a provision for the throttle shaft to exit for control by the throttle linkage. Until I added the air boxes to the carbs the engine wouldn't run under boost, at all! The problem was normalizing the pressure between the throttle bores and the float bowls.
Today Holley sells carbs that compensate for this by design and with no need for the carb enclosures. If you do not have the Holley carbs then you need the air boxes for the carbs. The new Holley carbs are much easier to work with.
This is a link to a 750 cfm Holley four barrel that is designed for blow through supercharged use, click here =>
Holley Blow Through Carb. It does not require an air box because it has been designed to internally normalize the pressure between the Venturis and the float bowls.
In addition to either the carb air boxes or the blower carb you will experience another aggravating challenge. The blower drives on those early Paxtons used five large (Inch or Inch and a Quarter) steel ball bearings that transmitted the drive torque from the drive belt to the blower. Even cleaned and lubricated these drives would fail with a regularity that was frustrating.
In fairness a lot of the failure was associated with running the blowers at high boost vs low boost. The problem for me, at the time, was low boost was not particularly impressive. The blower drives were/are (assuming they are still available) impressively expensive,
If you really want to use a centrifugal compressor today, I would use a modern design available in today's aftermarket. Names that quickly come to mind are All American Billet, the
new Paxtons, ProCharger, RIPP and Vortech. This particular path to supercharging or almost any for that matter is not inexpensive.
When you are done, intuitively you will expect thunderous power at the touch of the gas pedal — except it will not be there. The engine speed has to get high enough to get the compressor into positive pressure before your seat of the pants dyno will register anything.
If you are looking for that immediate hit on your seat of the pants dyno, it won't be there! If the immediate hit is important to you you will need a positive displacement (PD) compressor. There are two broad types available, the roots design and the twin screw design. Both will have a stunning response on your seat of the pants dyno when you first touch the throttle. The roots falls off quickly because of design inefficiencies. The twin screw does not. In fact it will pull until you drive over your crankshaft which I can tell you from personal experience is not a happy event.
Blowers are a lot of fun and if you are not prudent an even bigger expense — but the PD blowers will live up to your intuitive seat of the pants dyno expectations and then some ...